26989865 has 16 divisors (see below), whose sum is σ = 38292480. Its totient is φ = 17868480.

The previous prime is 26989843. The next prime is 26989943. The reversal of 26989865 is 56898962.

It is a happy number.

It is not a de Polignac number, because 26989865 - 2⁶ = 26989801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12281 + ... + 14310.

It is an arithmetic number, because the mean of its divisors is an integer number (2393280).

Almost surely, 2^26989865 is an apocalyptic number.

It is an amenable number.

26989865 is a deficient number, since it is larger than the sum of its proper divisors (11302615).

26989865 is a wasteful number, since it uses less digits than its factorization.

26989865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26632.

The product of its digits is 1866240, while the sum is 53.

The square root of 26989865 is about 5195.1770903406. The cubic root of 26989865 is about 299.9624582652.

The spelling of 26989865 in words is "twenty-six million, nine hundred eighty-nine thousand, eight hundred sixty-five".